// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/ftp/ftp_auth_cache.h"

#include "base/logging.h"
#include "url/gurl.h"

namespace net {

// static
const size_t FtpAuthCache::kMaxEntries = 10;

FtpAuthCache::Entry::Entry(const GURL& origin,
    const AuthCredentials& credentials)
    : origin(origin)
    , credentials(credentials)
{
}

FtpAuthCache::Entry::~Entry() { }

FtpAuthCache::FtpAuthCache() { }

FtpAuthCache::~FtpAuthCache() { }

FtpAuthCache::Entry* FtpAuthCache::Lookup(const GURL& origin)
{
    for (EntryList::iterator it = entries_.begin(); it != entries_.end(); ++it) {
        if (it->origin == origin)
            return &(*it);
    }
    return NULL;
}

void FtpAuthCache::Add(const GURL& origin, const AuthCredentials& credentials)
{
    DCHECK(origin.SchemeIs("ftp"));
    DCHECK_EQ(origin.GetOrigin(), origin);

    Entry* entry = Lookup(origin);
    if (entry) {
        entry->credentials = credentials;
    } else {
        entries_.push_front(Entry(origin, credentials));

        // Prevent unbound memory growth of the cache.
        if (entries_.size() > kMaxEntries)
            entries_.pop_back();
    }
}

void FtpAuthCache::Remove(const GURL& origin,
    const AuthCredentials& credentials)
{
    for (EntryList::iterator it = entries_.begin(); it != entries_.end(); ++it) {
        if (it->origin == origin && it->credentials.Equals(credentials)) {
            entries_.erase(it);
            DCHECK(!Lookup(origin));
            return;
        }
    }
}

} // namespace net
